It's pretty simple, do you have stock black merc power? Do you have blue motors w/o blowers, do you have blowers or turbos, do you have nonmerc NA motors, eggbeaters or do you have turbines.
How long is your boat and is it a cat or V or pontoon.
Thats about it. You want to run 2000 HP through a bravo, more power to you, you run in the same class as boats with 6's or surface drives.